Journal of Rehabilitation Research & Development (JRRD)

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JRRD Volume 46, Number 8, 2009

JRRD at a Glance

Vibrotactile identification of signal-processed sounds from environmental events

Parivash Ranjbar, PhD, et al.

Schematic figure of vibrator system from (a) side and (b) top (contact surface). Vibrator was Brüel & Kjær shaker type 4810 (Nærum, Denmark), and accelerometer was charge accelerometer Brüel & Kjær type 4371.

People with dual sensory impairment (hearing and vision) have difficulty obtaining information about ongoing events in their environment. They can feel the sounds produced by the events if these sounds are processed to suit the sensitivity features of the skin. Three different principles (eight algorithms)-transposing, modulating, and filtering-were used to process the sounds, which were then tested by 19 subjects using a stationary vibrator. Algorithm and subject were significant factors affecting the results. Two principles of transposing and modulating were appropriate, whereas filtering was unsuccessful. The two transposing algorithms and the modulating algorithms will be used in future tests with a portable vibrator for people with dual sensory impairment.

Volume 46 Number 8, 2009
   Pages 1021 — 1036

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